Grain scourer



(No Model.) 4 sheets sh'eet- 2.

'J. M. CASE. GRAINSGOURER.

Patentd'Aug. 27, 1889.

N. PETERS. Pholo-Lilhognphcr, wnhingion, D C.

(No-Mode l.) v .4 Sheets-Sheet 3..

J. CASE. GRAIN SGOURER.

N. PETERS. Photo-Lithograph". Washingiumll a (No Model.)

. 4 Sheets-Sheet 4. J. M. CASE. GRAIN SOOURER. .070., Paterited Aug.2'7, 1889.

N, PETERS PhamLnhapn-lphe Walhingmn. uzc

' UNITED STATES J PATENT OFFICE.

CASE, OF COLUMBUS, OHIO, ASSIGNOR TO THE CASE MANUFACTUR- ING COMPANY,OF SAME PLACE. I

GRAlN-SCOURER.

SPECIFICATION forming part of Letters Patent No. 410,070, dated August27, 1889.

Application filed Tune 20, 1887- To all whom it may concern.-

Be it known that I, JOHN M. CASE, a citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Grain-Scourers, of whichthe following is a full, clear, and exact description.

The invention consists in certain features of novelty, which arehereinafter more particularly pointed out in the claims, being firstfully described with reference to the accompanying drawings, in whichFigure I is a vertical section of my improved machine on the line II,Fig. II, looking in the direction of the arrow. Fig. II is a verticalsection thereof on the line II II, Fig. I, looking in the direction ofthe arrow. Fig. III is a horizontal section thereof on the line III III,Figs. I and II, looking downward. Fig. IV is a horizontal sectionthereof on the line IV IV, Figs. I and II, looking downward. Fig. V is atransverse section of a series of scouring-rings of preferred form. Fig.VI is a perspective View of one of said scouringrings removed. In thedevice which forms the subject of my present invention the grain is fedto the machine under pressure, whereby it is caused to pass throughnarrow spaces between overlapping rings, some of which are revolved,whereby the grain is thoroughly scoured, after which it is subjected toa blast of air suflicient in strength to carry off all the dislodgeddust and other impurities, together with light grains, such as cheat,8:0.

1 and 2 represent plates forming the end walls of the casing, the sidesbeing formed by a pair of semi-cylindrical sheet-metal plates 3 4,formed at their meeting edges with flanges 5, projecting outward andsecured together by bolts, as shown in Fig. II, in order that thecontinuity of the inner surface of the casing may not be broken.

6 is the shaft of the machine, which passes through the end walls 1 2 ofthe scouringchamber concentrically with the cylindrical sides thereof,said shaftbeing journaled near its ends in suitable boxes 7 and providedwith a pulley S for receiving a belt, whereby it is Serial No. 241,866.(No model.)

revolved. The plate 1 is cut away for affording admission to ahorizontal pipe 9, which projects into the scouring-chamberconcentrically with the sides thereof and terminates near theoppositeend plate 20f said chamber. This pipe 9 projects some distance from theouter surface of the end plate 1 and is closed at its outer end, exceptfor an opening just sufficient in size to permit the passage of theshaft 6. With the top side of the projecting end of this pipe 9communicates the lower end of a stand-pipe 10, by which it is suppliedwith the grain to be scoured, said stand-pipe being of such diameter andheight as to cause a heavy pressure within the pipe 9. 6 5

Secured to that portion of the shaft 6 which is situated within the pipe9 is a spiral conveyer 11, which operates to further increase thepressure on the grain and feed it into the scouring-chamber with greatforce. Secured 7c to the shaft 6 in close proximity to the end plate 2of the casing is a disk 12, to the inner surface of which is secured anydesired number of short cylinders or rings 13 14, which project towardthe opposite end of the scouring-chamber and terminate in closeproximity to the plate 1. These rings 13 14 are concentric with theshaft 6, and will of course be rotated thereby, beingsecured to the disk12, which in turn is fast on the shaft.

Projecting from the end plate 1 of the easing are similar rings, (thepipe 9 constituting in effect one, and another being shown at 15,) whichalternate with the rings 13 and 14 and terminate a short distance fromthe disk 12. This arrangement is such that spaces of uniform width areleft between the adjacent rings, so that the grain under pressure of thescrew conveyer 11 is forced to flow through the channel indicated by thearrows in Fig. 0. I until the space between the outermost ring and thecylindrical shell of the casing is reached. The grain then passes in thedirection shown by the arrow in Fig. II and finds its escape through anaperture, which is pref- 5 erably situated some distance above thelowest portion of the scouring-chamber, it being here shown as formedthrough the upper section 3 of the casing. These concentric over-.lapping rings may be smooth, as shown in too the discharge through theaperture 16.

Figs. I and II, but are preferably corrugated, as shown in Figs. V andVI, so as more violently to rub the grain, the corrugations being alsopreferably formed spirally in such manner as to cause the grain to befed forward in the direction indicated by the arrows in Fig. I.

Although I prefer to locate the dischargeopening 16 in the positionshown in the drawings, yet I do not desire to limit in this respectother features of my invention, which are in no wise dependent thereon.

A slide-valve 16 is provided for regulating The grain on leavingthescouring-chamber is discharged into a vertical air-trunk 17, which isopen at bottom to permit the grain to fall and also to permit the freeingress of air. At top it communicates with a settling-chamber 18through an aperture 19, cut in its side wall 17, the passage of airthrough this aperture being under the control of an adjustable valve 20,hinged at its top side. This arrangement of the valve causes the airentering the settling-chamber to take a downward course, therebyimmediately precipitating the heavier particles which it holds insuspension.

The settling-chamber, as is usual, is made of such size with relation tothe exhaust-aperture as to enable all the dust to settle therein. Thefloor 18 of the chamber is inclined at such an angle as will cause allthe matter which settles thereon to gravitate to an opening 21 in theside of the casin g remote from the opening 19, said opening 21 beingprovided with a weighted valve 22, adapted to retain within the chambera sufficient quantity of the accumulated matter to insure the perfectsealing of the said opening against the admission of air, but permittingall matter in excess of such a quantity to escape. The chamber 18communicates through an aperture 23, formed through the wall 18 with avertical air-trunk 24, which in turn communicates with the eye 25 of afan, which may be of any ordinary or approved construction and needs nofurther description here. The casing is shown at 26. It will be observedthat the aperture 23 is above the lower edge of the valve 20, so thatthe air is caused first to descend within the settling-chamber, and thearea of this chamber being so much larger than that of the opening 23and the force of the air within the chamber so much less per square inchthe result is that nearly if not quite all of the dust is precipitated.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent:

1. The combination, with the series of concentric overlapping rings,means for imparting rotary motion to the alternate rings, and a screwconveyer for forcing the grain into the central ring under pressure,substantially as set forth.

2. The combination, with the rotary shaft, of a series of concentricoverlapping rings having spirally-arranged corrugations, means forconnecting the alternate rings with said shaft, and a feed-pipedelivering the material. to be cleaned into the central ring,substantially as set forth.

3. The combination, with a series of overlapping rings, means forrevolving some of said rings, and a feed-pipe discharging into thecentral ring, of a circular casing having a discharge-aperture situatedabove the bottom thereof, substantially as set forth.

4. The combin ation,witl1 a series of overlapping rings and a shaft withwhich some of said rings are connected, of a horizontal pipe c011-stituting the innermost ring, a spiral conveyer situated within saidpipe, and a stand-pipe communicating with said pipe, substantially asand for the purpose set forth.

JOHN M. CASE.

\Vitnesses:

O. N. SI-IOUGH, E. D. ANDERSON.

